Pump



E. BATTEN.

PUMP. APPLICATION FILED SEPT 6, I919. 1,370,181 Patented Mar. 1, 1921.

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EDWARD BATTEN, or BECKENT-IAM, ENGLAND, ASSIGNOR ono n-rounrrr we now- 1 LANnwrLLrara enemas VAILE, or BEOKNNHAM; nNeLAND,-oNE-rou1tTrr 'ro ARTHUR BARBER, or BBOMLEY, EN LAND, AND oNn-rounrrr ro' BncKnNirAivr MOTOR CQMPANY, LIMITED, or BECKENHAM, ENeLaNi).

PUMP;

Specification of Letters Patent. I Pat g d 313 1; 1921 Application filed September 6, 1919. Serial No. 322,l '7l9.'

To all wkome't may concern: 4

Be it. known that I, EDWARD Barren, subject of the King of Great Britain, residing at 17 l Vestfield road, Beckenham, in the countyof Kent,- England, have invented certain new and useful- Improvements in or Relating to Pumps, of which the following isa specification.

' This invention relatesv to pumps of the kindoperated by the foot and lILlBQIlCl$d especially for inflatingpneumatic tires.

According to the invention", the reciprocating member or piston of the pump is connected through pivoted toggle like links to a longitudinal member constituting the base plate of the pump and also to'the operat- .ing pedal which latter is connected by an:

other longitudinal member to the upper part of the pump. barrel remote from the pedal. The said toggle like links are preferably disposed inv two pairs in such a manner. that the plane containing the pivotal axis of the pair at the base plate and the pivotal axis of the pair at the pedal,'when the latteris in its uppermost position, intersects a continuation of the axis of the pump barrel at a point considerably farther from the piston, than the axis of the pivotal connection by which the twov pairs of links are jolned to said piston. In other words the two longitudinal members are disposed at any angle to each other and when two pairs of links are employed as aforesaid each of the longi tudinal members may also be, arranged in pairs. The barrel is adapted to oscillate about a trunnion at the rear. end of the base plate. In order. to, produce asymmetrical construction, the links of each pairmay be of the same length and the axis of thev said trunnion is situated at a; distance equal to the length 01"- each of the said tension members from the-axis at which the lower P2111 of linksare pivoted to the base plate. -YVe' provide resilient means which may be inthe form of a compression spring situated around the piston rod with one end abuttingfagainst' a member on the pump barrel and the other end'against a member 'on the piston rod. These resilient means operate on the toggle like links in a direction to 'keep the longitudinal members apart and put them in a conditionot ten ion and item the P a In order'.that the said invention may be clearly understood and readily carried into efiiectpthe same willnow be more fullyfdescribed with reference to the accompanying drawings in which z Figure 1 is avertical section of one form pf the improved air pump with-the pedal in its uppermost position." F g. 21s fillwQlGVfltlOIl of the same with. 1

the pedal depressed,'a nd* Fig. 3 is a plan of- Fig. 2.

.1 is the oscillatorybarrel or, cylinder, of-

the pump. :2 is the rod of the piston 3. 4E,

bare the twopivoted links connecting the piston rod 2- to the lower longitudinal members constituting the base, plate 6 of the pump, while'i, Share the two pivoted links connecting the said piston rod to the operating pedal 9.. 10, 11 are the upper longitudinal members consisting of steel straps for connecting the pedal 9 to the upperrear' part of the barrel 1 and 12 is thespring for exert- .ing tension on the longitudinal members and for returning the piston v3 when the pressure of the users foot on the pedal is relieved. V

The pump rear portionby means of trunnions 13 to two upstanding lugs 14, 15. at the rear end of the base plate6. At its forward endthe barrel is pivoted at its lower base plate has two-further upstandinglugs 16,17 through which extends a pin 18 which serves as a pivotfor the lower ends of the links at, 5 and is secured in place by means of transverse pins passing through the lugs, a sleeve or distance piece being provided around the said pin 18 andserving to keep the lower ends of the said links 4, 5 at their proper distance apart. The upper-ends of these linksA, 5 are'pivoted by means of a long pin 21 to the lower endsof the links 7,8 and also to amember 20 which is screw threaded into the piston rod 2 which is tubular, the said pivot pin 21 being fixed to the-member, 20 by a tapered pin '22. I long pivot pin .is provided with four spacing" washers 23, 24,; 25,26 and OlltSlCl BTthB washers 23 and'26 split pins pass through the said pivot pin. Attheir upper ends the links 7, 8 engage a pivot pin 27 fixedby a tapered pin 29 to a lug28 projecting doWn.-

- inner face.

30, 31 on the pumpbarrel 1, and are about the same length as the base plate 6. The

four links 4, 5, 7 8 are all equal in length.

so that they are equally inclined to the axis of the piston rod 2 and during the downward movement of the pedal 9 the pivot pin 21 remains equidistant from the basepla'te 6 and the straps 10, 11. I c

The rear of the pump barrel 1 is closed by an aluminium casting 34 which is flat on its The delivery passage of the pump is formed in the casting 34 and is furnished with a ball non-return valve 35 and with a pressure gage 36 and flexible tubular connection 37 as usual.

The piston 3 is also an aluminium casting somewhat of mushroom shape. Its-stem is screw threaded and'enters the tubular piston rod 2. A disk 38 is threaded upon the stem of the piston and a cup leather 39 is clamped between the disk 38 and the piston 3. The

pump barrel has a perforated cover 41 inser'ted in'its open end and retained therein by screws 42. The spring 12, made for the sake of compactness, as a volute steel spring is disposed between the perforated cover 41 and a washer 43', which is held in place against the end of the tubular piston rod 2 by a lock nut 44. A relatively weak cushioning spring 45 is inserted between the disk 38 and the cover 41. The rear face of the piston is fiat and means are provided vfor adjusting the stroke of the pump so thatthe rear face of the piston at the end of the delivery stroke just comes into contact with the front face of thefcasting 34 with the result that the only clearance the pump has is-the volume of the small delivery passage 40 in the casting. 34. The means-for effect ing this adjustment comprise the threaded stem of the member 20 which canbe adjusted within the tubular rod 2 until when the pedal 9 ,isfully depressed the-piston 3 just comes into contact with the casting 34,

adjusted position by the'nut' 44.

In? operating the pump, the pedal 9 is depressed by the foot of the user into the position shown in Figs. '2 and 3, thereby causing the piston to perform the delivery stroke and, force the air containedin the barrel through the delivery passage40 beyond the ball valve 35. On thereturn .or suction stroke whlch occurs. when the pressure of the users foot on the pedal is relieved the valve 35'cl0ses and air is drawn in through the perfprated cover 41 past the cup-leather 39. During the operation of the pump the barrel 1 oscillates about the trunnion 13, so that the'jpin 21 always keeps in line with the axis of the barrel and in the downward move ment the'spring 12 is compressed and the upper longitudinal members or straps 10-, 11

are also slightly bent thus assisting the action of the spring 12 to some extent during 7 the return movement.

In order to enable the pump to be packed into a small space during transport the pedal 9 is cast with a projecting hook 46' and the front of the base plate has a wire loop or stirrup 47 which is capable of engaging with the hook 46 to hold-the pump in the depressed position. The pump is shown in this position in Fig. 2. By depressing the pedal 9 beyond-the position indicated by Fig. 2 until the hook 46 disengages the loop 47 the latter will becomereleased by'the action of gravity. p

1. In a foot operated pump, the combination of a base plate, a cylinder 'pivotally mounted on said base plate, a piston in said cylinder, an operating pedal, a connection between said pedal and said cylinder and toggle linksconnecting said pedal and base plate and coupled to said-piston.

2. In a' foot operated pump, the combi nation of a base plate, a cylinder pivotally mounted on said base plate, apiston in said cylinder, an operating pedal, a connection between said pedal and said cylinder,tog-

gle links connecting said pedal and. base plate and coupled to said piston, and means for normally straightening said toggle and elevating said pedal.

3. In a foot operated nation of a base plate,a cylinder pivotally mounted on said base plate, a piston in said cylinder, an operating pedal, a connecum) the combition between said pedal and said cylinder, toggle-links connecting said pedal and base plate and coupled to said pistonpand a spring interposed between said cylinder and said toggles tending to straightensaid toggle and elevate said pedal. 7

4; In a foot operated pump, the combii plingsaid pedal to said cylinder. a pistonadapted to reciprocate'within saidcylin'der' and-two pairs of pivoted links connecting said piston respectivelyto said pedal'and to one end of said base plate.

6. A foot-operated pump comprising a stationary base plate, a trunnion mounted on the rear end thereof, a cylinder formed with rearwardly-disposed upward projections and mounted invan oscillatory manner in said trunnion, a piston adapted to reciprocate within said cylinder, a pair of pivoted links connecting said piston to the forward end of said base plate, an operating pedal, a further pair of pivoted links substantially equal in length to the pair of links aforesaid and connecting said piston to said pedal, and a pair of tensionmemhers connecting said pedal to said upward projections and substantially equal in length to the distance betweensaid trunnion and the point of connection ofsaid links with the forward end of said base plate.

7. A foot pump consisting in the combination of an oscillatory pump cylinder and piston, relatively movable longitudinal members inclined at an angle to each other and between whichsaid oscillatory cylinder and piston are situated, toggle-like links connecting the outer ends of said longitudinal members to the piston, resilient means for exerting pressure on the toggle-like links in a direction to separate said longitudinal members and put them in a condition of tension along their length and means for enabling the user to exert pressure on the upper end of the toggle-like links against the pressure of said resilient means and thereby cause the longitudinal members to approach each other thus folding the links and operating the pump piston.

8. A foot pump consisting in the combination of an oscillatory pump cylinder and piston, relatively movable longitudinal tension members inclined at an angle toeach other and between which said oscillatory cylinder and piston are situated, toggle-like links connecting togetherthe outer ends of said longitudinal tension members, a rod on said piston connected ,to the intermediate joint of the toggle-like links, a spring surrounding the piston rod and abutting at one end against the cylinder and at the other end againsta shoulder on the piston rod to separate said longitudinal members and put them in their condition of tension along their length and meansfor enabling the user to exert pressure on the upper end of the toggle-like links for actuating thelatter against the pressure of said spring.

9. A foot pump consisting in the combination of an oscillatory pump cylinder and piston, relatively movable longitudinal tension members inclined at an angle to each other and between which said oscillatory cylinder and piston are situated, toggle-like links connecting together the outer ends of said longitudinal members, a rod on said piston connected to the intermediate joint of the toggle-like links, a spring surrounding the piston rod and abutting at one end against the cylinder and at the other end against a shoulder on the piston rod to separate said longitudinal members and put their length and an operating pedal at vthe upper end of the toggle-like links.

10. A foot pump consisting in the combination of an oscillatorypump cylinder and piston, relatively movable longitudinal tension members inclined at an angle to each "other and between which said oscillatory cylinder andpiston are situated, the lower longitudinal member" constituting a base them in their condition of tension along plate, means for-,pivotallyconnecting: said cylinder to the rear endof said base plate, togglerlikei links connecting together the outer ends of saidlongitudinal members,- a

' rod on said piston connected to the intermesion members arranged in pairs and inclined at an angle to each other and --between which said oscillatory cylinder. and piston are situated, the lower pair of said members constituting a base plate, trunnions on said cylinder pivotally mounted in lugs at the rear end of said .base plate, two,

pairs of toggle-like links connecting together the outer ends of said longitudinal tension members, a rod on said piston con nected to the intermediate joint of the togf gle-like links, a spring surrounding the piston rod and abutting at one end against the cylinder and at the other end against a shoulder on'the piston rod to separate said longitudinal members and put them in their condition of tension along their length and an operating pedal at the upper end of the toggle-like links.

12. A foot pump consisting in the combination of an oscillatory pump cylinder and piston, relatively movable longitudinal tension members inclined at an angle to each other and between which said oscillatory cylinder and piston are situated, the lower longitudinal member constituting a base plate, trunnions on said cylinderpivotally mounted in lugs at the rear end of said base plate, means connecting the inner end of the upper tension member to the rear end of said cylinder, toggle-like links connecting together the outer ends of said longitudinal members, a rod on said piston connected to the intermediate joint of the toggle-like links, a spring surrounding the piston rod and abutting at one end against the cylinder 7 Y and at the other end against a shoulder on the piston rod to separate said longitudinal members and put them in their condition of tension along their length and an operating pedal at the upper end of the toggle-like links. V

13. A foot pump consisting in the combination of an oscillatory pump cylinder and piston, relatively movable longitudinal tension members inclined at an angle to each other and between which said oscillatory cylinder and piston are situated with the point of oscillation between the inner ends of said longitudinal members, toggle-like links connecting together the outer ends of said longitudinal members, a rod on said piston connected to the intermediate joint rounding t e piston rod and abutting at one end against the cylinder and at the other end against a shoulder on the piston rod to separate said longitudinal members and put them in their condition of tension along their length and means for enabling the userto exert pressure on the upper end of the toggle-like links against the pressure of said volute spring and thereby cause the longitudinal members to approach each other thus folding the links and operating the pump piston.

EDWARD BATTEN. 

